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06-25-08 Additions
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and no boating on Savage Lake. It is used for aesthetic viewing and as a wildlife resource. <br />There may be some canoe and paddleboat usage. <br />Aichinger reported that the district has no historical water quality data for Savage Lake as they <br />do not collect data on wetlands. He also noted that cities do not generally collect water quality <br />data on lakes or wetlands. Again, Savage Lake is a shallow wetland and not a lake. Aichinger <br />reported that the Watershed recently did some sampling and found that Savage Lake's water <br />quality is within normal ranges. <br />With regard to Savage Lake water levels, Aichinger described the gated outlet that previously <br />existed on the east basin. This gate was difficult to operate and was rusted shut. The Watershed <br />was contacted to put in a new outlet that would require less maintenance. Aichinger reported <br />that a weir was installed and showed a diagram of that structure. He further reported that a <br />1 -foot riser was later added to the weir in response to property owners concerns about the <br />wetland level. Aichinger again noted that the DNR has set the level at 895.1. He pointed out <br />that the levels of Savage Lake have been and will be impacted by draught and heavy rain <br />periods. Aichinger noted that interest that some property owners abutting Savage Lake have in <br />increasing water levels. Options would need to be explored in this regard. <br />The City Engineer presented information detailing the drainage boundaries to Savage Lake, as <br />well as the locations of storm sewer outlets on both the east and west basins of Savage Lake. In <br />addition to direct outlets into Savage, there is drainage that comes from the Demont /Jackson <br />wetland as well as the Sleepy Hollow pond. The water coming through the Demont/Jackson <br />wetland and the Sleepy Hollow pond is treated before it gets into Savage. The Engineer noted <br />that the Demont wetland was more open water at one time. The portion of the wetland at the <br />intersection of Demont and Jackson is filling with sediment, which indicates that the wetland is <br />working. The Engineer estimated that about 500 yards of material could be removed from this <br />wetland. He noted that sediment removal has occurred from the Sleepy Hollow pond. <br />The Engineer reported that in the past there have been little to no regulations relative to storm <br />water treatment. The yearly treatment requirements which came about in the 1980's had more to <br />do with rate control than treatment. Therefore, there are outlets draining directly into Savage <br />Lake with no pre- treatment. <br />The Engineer detailed the storm water treatment improvements being made as part of the <br />Unweave The Weave project noting that storm water ponding is being added to provide for <br />treatment. One direct inlet into Savage from the freeway ramp area has been removed. There is <br />still a direct inlet in the area of Gopher Electronics. There are a couple of catch basins in the <br />median that direct run -off into East Savage. There is a swale on Savage Lane that runs into the <br />lake. There is also an equalizing pipe between East and West Savage. In addition to these public <br />inlets, the City Engineer noted that there are private inlet such as an inlet from the St. John's <br />parking lot, a swale from Gopher Electronics, and all the abutting yards around both Savage <br />basins. <br />The Engineer reviewed options for improving water quality into Savage Lake, and indicated that <br />the most cost effective means was the addition of rain water gardens throughout the Savage Lake <br />72 <br />
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